Cherry Gall Wasp
- Cynips quercusfolii

Cynips quercusfolii is a small black gall wasp. Its larvae cause cherry galls to form on the leaves of some species of oak. The galls are succulent, 15 to 25 mm in diameter, smooth on Quercus robur or warty on Quercus petraea; yellow-green suffused with pink or red, and later dark red then brown with a thick walled chamber. The gall is seen more often than the gall wasp.

Habitat

Around oaks.

When to see it

Galls appear towards autumn.

Life History

Its larvae cause cherry galls to form on the leaves of some species of oak (see above).